.middlebck{
	width:8px;
	background-color:#b0d1fa;
}
.sou01{
	width:6px;
	height:64px;
	cursor:hand;
	background-image:url(sou01.jpg);
}
.sou02{
	width:6px;
	height:64px;
	cursor:hand;
	background-image:url(sou02.jpg);
}